/**
 * @author ghp
 * @date 2023/6/17
 * @title
 * @description
 */
public class Main {
    public static void main(String[] args) {
        Solution solution = new Solution();
        int i = solution.maximalRectangle(new char[][]{{'1', '0', '1', '0', '0'}, {'1', '0', '1', '1', '1'},
                {'1', '1', '1', '1', '1'}, {'1', '0', '0', '1', '0'}});
        System.out.println(i);
    }
}
